gdb/hp300ux-xdep.c

   1 /* HP/UX interface for HP 300's, for GDB when running under Unix.
   2    Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 GDB is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 GDB is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GDB; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include <stdio.h>
  21 #include "defs.h"
  22 #include "param.h"
  23 #include "frame.h"
  24 #include "inferior.h"
  25
  26 /* Defining this means some system include files define some extra stuff.  */
  27 #define WOPR
  28 #include <sys/param.h>
  29 #include <sys/dir.h>
  30 #include <signal.h>
  31 #include <sys/user.h>
  32 #include <sys/ioctl.h>
  33 #include <fcntl.h>
  34
  35 #include <sys/ptrace.h>
  36 #include <sys/reg.h>
  37 #include <sys/trap.h>
  38
  39 #include "gdbcore.h"
  40
  41 #include <sys/file.h>
  42 #include <sys/stat.h>
  43
  44 #define INFERIOR_AR0(u)                                                 \
  45   ((ptrace                                                              \
  46     (PT_RUAREA, inferior_pid, ((char *) &u.u_ar0 - (char *) &u), 0))    \
  47    - KERNEL_U_ADDR)
  48
  49 static void
  50 fetch_inferior_register (regno, regaddr)
  51      register int regno;
  52      register unsigned int regaddr;
  53 {
  54 #ifndef HPUX_VERSION_5
  55   if (regno == PS_REGNUM)
  56     {
  57       union { int i; short s[2]; } ps_val;
  58       int regval;
  59
  60       ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
  61       regval = ps_val.s[0];
  62       supply_register (regno, &regval);
  63     }
  64   else
  65 #endif /* not HPUX_VERSION_5 */
  66     {
  67       char buf[MAX_REGISTER_RAW_SIZE];
  68       register int i;
  69
  70       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  71         {
  72           *(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid, regaddr, 0);
  73           regaddr += sizeof (int);
  74         }
  75       supply_register (regno, buf);
  76     }
  77   return;
  78 }
  79
  80 static void
  81 store_inferior_register_1 (regno, regaddr, value)
  82      int regno;
  83      unsigned int regaddr;
  84      int value;
  85 {
  86   errno = 0;
  87   ptrace (PT_WUAREA, inferior_pid, regaddr, value);
  88 #if 0
  89   /* HP-UX randomly sets errno to non-zero for regno == 25.
  90      However, the value is correctly written, so ignore errno. */
  91   if (errno != 0)
  92     {
  93       char string_buf[64];
  94
  95       sprintf (string_buf, "writing register number %d", regno);
  96       perror_with_name (string_buf);
  97     }
  98 #endif
  99   return;
 100 }
 101
 102 static void
 103 store_inferior_register (regno, regaddr)
 104      register int regno;
 105      register unsigned int regaddr;
 106 {
 107 #ifndef HPUX_VERSION_5
 108   if (regno == PS_REGNUM)
 109     {
 110       union { int i; short s[2]; } ps_val;
 111
 112       ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
 113       ps_val.s[0] = (read_register (regno));
 114       store_inferior_register_1 (regno, regaddr, ps_val.i);
 115     }
 116   else
 117 #endif /* not HPUX_VERSION_5 */
 118     {
 119       char buf[MAX_REGISTER_RAW_SIZE];
 120       register int i;
 121       extern char registers[];
 122
 123       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
 124         {
 125           store_inferior_register_1
 126             (regno, regaddr,
 127              (*(int *) &registers[(REGISTER_BYTE (regno)) + i]));
 128           regaddr += sizeof (int);
 129         }
 130     }
 131   return;
 132 }
 133
 134 void
 135 fetch_inferior_registers (regno)
 136      int regno;
 137 {
 138   struct user u;
 139   register int regno;
 140   register unsigned int ar0_offset;
 141
 142   ar0_offset = (INFERIOR_AR0 (u));
 143   if (regno == -1)
 144     {
 145       for (regno = 0; (regno < FP0_REGNUM); regno++)
 146         fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 147       for (; (regno < NUM_REGS); regno++)
 148         fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 149     }
 150   else
 151     fetch_inferior_register (regno,
 152                              (regno < FP0_REGNUM
 153                               ? REGISTER_ADDR (ar0_offset, regno)
 154                               : FP_REGISTER_ADDR (u, regno)));
 155 }
 156
 157 /* Store our register values back into the inferior.
 158    If REGNO is -1, do this for all registers.
 159    Otherwise, REGNO specifies which register (so we can save time).  */
 160
 161 store_inferior_registers (regno)
 162      register int regno;
 163 {
 164   struct user u;
 165   register unsigned int ar0_offset;
 166   extern char registers[];
 167
 168   if (regno >= FP0_REGNUM)
 169     {
 170       store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 171       return;
 172     }
 173
 174   ar0_offset = (INFERIOR_AR0 (u));
 175   if (regno >= 0)
 176     {
 177       store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 178       return;
 179     }
 180
 181   for (regno = 0; (regno < FP0_REGNUM); regno++)
 182     store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 183   for (; (regno < NUM_REGS); regno++)
 184     store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 185   return;
 186 }
 187
 188 \f
 189 /* Take the register values out of a core file and store
 190    them where `read_register' will find them.  */
 191
 192 #ifdef HPUX_VERSION_5
 193 #define e_PS e_regs[PS]
 194 #define e_PC e_regs[PC]
 195 #endif /* HPUX_VERSION_5 */
 196
 197 void
 198 fetch_core_registers (core_reg_sect, core_reg_size, which)
 199      char *core_reg_sect;
 200      int core_reg_size;
 201      int which;
 202 {
 203   int val, regno;
 204   struct user u;
 205   struct exception_stack *pes = (struct exception_stack *) core_reg_sect;
 206 #define es (*pes)
 207   char *buf;
 208
 209   if (which == 0) {
 210     if (core_reg_size <
 211                   ((char *) &es.e_offset - (char *) &es.e_regs[R0]))
 212           error ("Not enough registers in core file");
 213     for (regno = 0; (regno < PS_REGNUM); regno++)
 214       supply_register (regno, &es.e_regs[regno + R0]);
 215     val = es.e_PS;
 216     supply_register (regno++, &val);
 217     supply_register (regno++, &es.e_PC);
 218
 219   } else if (which == 2) {
 220
 221     /* FIXME: This may not work if the float regs and control regs are
 222        discontinuous.  */
 223     for (regno = FP0_REGNUM, buf = core_reg_sect;
 224          (regno < NUM_REGS);
 225          buf += REGISTER_RAW_SIZE (regno), regno++)
 226       {
 227         supply_register (regno, buf);
 228       }
 229   }
 230 }